YS 140 problem

[Bob Kane]

Glad you found the problem. Don't fret about about
being fooled by the tach, chalk that one up to
experience, we can all learn from it.

--- "Daniel J. Hamlett" <d77hamlett at comcast.net>
wrote:

> I really hate to do this to myself but I think that
> I owe it to all the 
> people that offered an opinion to me about my
> engine.  The engine has 
> been idling at 2150-2200 all along.  The tach that I
> was using was 
> taking a really long time to settle down.  It had
> been a while since I 
> had used it.  I had a friend help me at the field
> before I went drilling 
> hole and what not.  When he put the tach on the
> engine he waited a 
> little bit longer than I was apparently and the
> engine or actually the 
> display on the tach dropped right into line.  Come
> to find out the 
> battery in the tach was very very low.  I replaced
> it and now the tach 
> reads pretty quick.  So I guess all that to say I am
> a big DUMMY.
> 
> I thought that I would share this as a little humor.
>  Again thanks to 
> all that gave there input.
> 
> See you all at the next contest.
> 
> Dan
> 
> John Ferrell wrote:
> 
> > I still say if you back down to a 15-12 or a 16-10
> you will find the 
> > idle will be fine. And you will have the strongest
> YS140 around!
> >  
> > The increased air bleed has worked for lots of
> engines as well. I have 
> > never had to resort to it.
> >  
> > John Ferrell   
> > http://DixieNC.US
> >
> >     ----- Original Message -----
> >     *From:* Daniel J. Hamlett
> <mailto:d77hamlett at comcast.net>
> >     *To:* discussion at nsrca.org
> <mailto:discussion at nsrca.org>
> >     *Sent:* Saturday, July 16, 2005 10:22 AM
> >     *Subject:* Re: YS 140 problem
> >
> >     I am getting 8400-8450.  That is why I thought
> that I was ok on
> >     the size.
> >
> >     John Ferrell wrote:
> >
> >>     My two cents worth....
> >>     That is the first time I have heard of that
> much prop on a Sport
> >>     140. It is way too much prop for break in of
> a new engine. I
> >>     don't know if there is any damage due to that
> load. I use about
> >>     40 ounces of fuel on tat engine to break it
> in with a 15-10 prop
> >>     at about 8200 rpm.
> >>      
> >>     I feel the bigger prop will generate more
> heat and will need more
> >>     latitude for mixture control than the YS
> system provides. When
> >>     more prop than a 15-12 or 16-10 is used on a
> YS 140 engine (not
> >>     DZ!) more nitro is needed. There is more
> oxygen available in the
> >>     higher nitro fuel so you have a wider needle
> available.
> >>      
> >>     BTW, what is the max rpm you get out of a
> 17-10 with 20% fuel?
> >>      
> >>     John Ferrell   
> >>     http://DixieNC.US
> >>
> >>         ----- Original Message -----
> >>         *From:* Daniel J. Hamlett
> <mailto:d77hamlett at comcast.net>
> >>         *To:* discussion at nsrca.org
> <mailto:discussion at nsrca.org>
> >>         *Sent:* Thursday, July 14, 2005 10:06 PM
> >>         *Subject:* Re: YS 140 problem
> >>
> >>         The engine is a sport.  It has less than
> 40oz through it.  I
> >>         am running  the 1.40, NHP 5/8th header
> and ES carbon 5/8th
> >>         inlet pipe.  Sorry I forgot to add this
> on the original post.
> >>
> >>         Bob Kane wrote:
> >>
> >>>Which 140?  FZ, L, DZ, Sport?  I assume it must
> be a
> >>>DZ swinging a 17X10?
> >>>
> >>>      
> >>>
> 


Bob Kane
getterflash at yahoo.com

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